<!DOCTYPE html>

  <meta charset="UTF-8">

  <title>CSS Reftest reference</title>

  <style>
  div
    {
      background-color: green;
      height: 30px;
      margin: 50px;
      position: relative;
      width: 30px;
    }

  div#top-right
    {
      left: 130px;
      bottom: 80px;
    }

  div#bottom-left
    {
      bottom: 30px;
    }

  div#bottom-right
    {
      left: 130px;
      bottom: 110px;
    }
  </style>

  <p>Test passes if there are four identical green squares and <strong>no red</strong>.

  <div id="top-left"></div><div id="top-right"></div><div id="bottom-left"></div><div id="bottom-right"></div>
